I configured authoritative time server at the top parent domain for my whole forrest. Server is synchronizing with us.pool.ntp.org. We have child domains in different countries. Time changed in one of these countries and both DC's in this country do not reflect the change because they get their time from top parent domain DC. How do I stop these DC's from synchronizing with top DC so time can be modified manually in both servers and they reflect local time? All servers are Windows 2003 Servers.